#VU109181 Inefficient regular expression complexity in Semver-regex - CVE-2021-43307
Published: May 14, 2025
Vulnerability identifier: #VU109181
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-43307
CWE-ID: CWE-1333
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Semver-regex
Semver-regex
Software vendor:
sindresorhus
sindresorhus
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions. A remote attacker can pass specially crafted data to the application and perform regular expression denial of service (ReDos) attack.
Remediation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability..